KR102358819B1 - Circuit breaker equipped with instantaneous earth leakage double trip device and instantaneous earth leakage double trip device insulated from the circuit - Google Patents

Abstract

According to one embodiment of the present invention, a circuit breaker including an electric leakage instantaneous double trip device includes first and second instantaneous trip devices configured to perform an instantaneous trip operation when a fault current occurs, wherein each of the first and second instantaneous trip devices commonly includes: a fixed magnet for generating a magnetic attraction force when the fault current flows; a movable magnet provided at a position adjacent to the fixed magnet while making non-contact with the fixed magnet, and configured to make contact or non-contact with the fixed magnet according to the magnetic attraction force of the fixed magnet; and a first wire unit provided to pass through an inside of the fixed magnet to form an electric circuit in a predetermined direction, and the second instantaneous trip device further includes an electric leakage trip coil unit fixed to the fixed magnet so as to perform an electric leakage trip operation for a leakage current in addition to the instantaneous trip operation. Accordingly, a manufacturing cost of the circuit breaker is greatly reduced.

Description

Circuit breaker equipped with instantaneous earth leakage double trip device and instantaneous earth leakage double trip device insulated from the circuit

The present specification proposes an instantaneous earth leakage double trip device and a circuit breaker having the same.

The conventional circuit breaker has an instantaneous trip function and an earth leakage trip function, respectively, and is included in the trip device. Here, the trip refers to an operation in which, when an abnormal/fault current occurs in the circuit breaker, the circuit breaker detects it and automatically cuts off the power. As for the trip operation, according to the method of tripping the circuit breaker, the thermal type using the curvature characteristics of the bimetal and the thermal type using the fixed and movable iron core in addition to the thermal function, silicon The all-electric type using the viscosity of oil, the electromagnetic type using an electronic circuit after detection with a current detector or a sensor for current detection, etc. are known.

In particular, in the conventional circuit breaker, the instantaneous trip device was installed to be in contact with the electric circuit, and each instantaneous trip operation was performed while the voltage was charged. That is, since the trip device in the conventional circuit breaker is in a charged state, the insulation problem of the circuit breaker itself can be prevented only when sufficient insulation between components in the circuit breaker having multiple poles is performed. Therefore, in order to implement a sufficient insulation treatment, it is designed to sufficiently maintain the insulation distance between components, the number of assembly-related components increases, and the component size increases, resulting in a problem that the overall size and complexity of the circuit breaker is greatly increased.

Accordingly, in the present specification, an instantaneous earth leakage double trip device and a circuit breaker equipped with the device are proposed in which the problems such as complicated assembly and increase in overall size of the prior art are resolved.

According to an embodiment of the present invention, there is provided a circuit breaker including an earth leakage instantaneous double trip device, comprising: first and second instantaneous trip devices for performing an instantaneous trip operation when a fault current occurs; including, wherein each of the first and second instantaneous trip devices includes: a fixed magnet generating a magnetic attraction force when the fault current flows; a movable magnet provided in a position adjacent to the fixed magnet in a non-contacting state with the fixed magnet, in contact or non-contact with the fixed magnet according to a magnetic attraction force of the fixed magnet; and a first wire part provided to penetrate the inside of the fixed magnet to form a circuit in a predetermined direction; The second instantaneous trip device may further include an earth leakage trip coil unit fixed to the fixed magnet to perform an earth leakage trip operation for the earth leakage current in addition to the instantaneous trip operation.

According to an embodiment of the present invention, while the earth leakage trip device and the instantaneous trip device are shared, the assembling property is improved through assembly and parts simplification, thereby generating the effect of greatly reducing the manufacturing cost of the circuit breaker.

In addition, according to an embodiment of the present invention, since the voltage is not charged in the earth leakage trip device and the instantaneous trip device, it is unnecessary to maintain an insulating distance between parts for insulation, add insulating parts, etc., thereby greatly reducing the overall part size and manufacturing cost. is effective.

In addition, according to an embodiment of the present invention, it is possible to increase or decrease the number of windings of the electric wire passing through the fixed magnet, so that it is easy to manufacture the circuit breaker according to the rating.

In addition, according to an embodiment of the present invention, since the work of assembling from the back of the circuit breaker (ie, the process of assembling the circuit breaker upside down) is not required, assembly complexity and assembly time are greatly reduced.

Various other effects of the present invention will be described later in detail with reference to each of the following examples.

1 is a plan perspective view of a circuit breaker according to an embodiment of the present invention.
2 is an exploded perspective view of a circuit breaker according to an embodiment of the present invention.
3 is a cross-sectional view of a circuit breaker according to an embodiment of the present invention.
4 is a diagram illustrating components of a first instantaneous trip device according to an embodiment of the present invention.
5 is a diagram illustrating components of a second instantaneous trip device according to an embodiment of the present invention.
6 to 8 are views illustrating a fixing/installing method of a fixing magnet and an earth leakage trip coil unit to a magnet support according to an embodiment of the present invention.
9 is a view illustrating a fixing/installing method of a movable magnet for a magnet support according to an embodiment of the present invention.
10 and 11 are assembly views of first and second instantaneous trip devices according to an embodiment of the present invention.
12 to 14 are diagrams illustrating instantaneous trip operations of first and second instantaneous trip devices according to an embodiment of the present invention.
15 and 16 are diagrams illustrating an earth leakage trip operation of a second instantaneous trip device according to an embodiment of the present invention.
17 to 19 are conceptual views illustrating an embodiment of the winding increase/decrease of the first electric wire part according to an embodiment of the present invention.
20 and 21 illustrate the completeness of the assembly of the circuit breaker according to an embodiment of the present invention.

Since the technology to be described below may have various changes and may have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the technology described below to specific embodiments, and it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the technology described below.

Terms such as first, second, A, and B may be used to describe various components, but the components are not limited by the above terms, and only for the purpose of distinguishing one component from other components. is used only as For example, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component without departing from the scope of the present invention. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items. For example, 'A and/or B' may be interpreted as meaning 'at least one of A or B'. Also, '/' may be interpreted as 'and' or 'or'.

In terms of terms used herein, the singular expression should be understood to include a plural expression unless the context clearly dictates otherwise, and terms such as "comprises" include the specified feature, number, step, operation, and element. , parts or combinations thereof are to be understood, but not to exclude the possibility of the presence or addition of one or more other features or numbers, step operation components, parts or combinations thereof.

Prior to a detailed description of the drawings, it is intended to clarify that the classification of the constituent parts in the present specification is merely a division according to the main function each constituent unit is responsible for. That is, two or more components to be described below may be combined into one component, or one component may be divided into two or more for each more subdivided function. In addition, each of the constituent units to be described below may additionally perform some or all of the functions of other constituent units in addition to the main function it is responsible for. Of course, it can also be performed by being dedicated to it.

In addition, in performing the method or method of operation, each process constituting the method may occur differently from the specified order unless a specific order is clearly described in context. That is, each process may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

1 is a plan perspective view of a circuit breaker according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a circuit breaker according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the circuit breaker according to an embodiment of the present invention.

1 to 3 , the circuit breaker 100 according to an embodiment of the present invention may largely include first and second instantaneous trip devices 110 - 1 and 110 - 2 .

The first and second instantaneous trip devices 110 - 1 and 110 - 2 may basically correspond to a module/configuration/assembly/part that performs an instantaneous trip operation when a fault current occurs. The first and second instantaneous trip devices 110 - 1 and 110 - 2 may include at least one component for instantaneous trip operation. More specifically, the first and second instantaneous trip devices 110 - 1 and 110 - 2 may include a fixed magnet 280 , a movable magnet 250 , and a first wire unit 320 in common. , the second instantaneous trip device 110 - 2 may further include an earth leakage trip coil unit 810 in addition to this. According to this structure, the first and second instantaneous trip devices 110 - 1 and 110 - 2 may be divided according to assembly circumstances (ie, whether the earth leakage trip coil unit 810 is assembled/inserted). In more detail, when assembling/inserting the earth leakage trip coil unit 810 into the first instantaneous trip device 110-1, the first instantaneous trip device 110-1 and the second instantaneous trip device 110-2 may be, and when the earth leakage trip coil unit 810 is separated/released from the second instantaneous trip device 110-2, the second instantaneous trip device 110-2 becomes the first instantaneous trip device 110-1. ) can be

The fixed magnet 280 may be magnetized as a magnetic flux density increases when a fault current flows to generate a magnetic attraction force. The fixed magnet 280 may have a fixed position within the circuit breaker 100, for example, the fixed magnet 280 is fixed to the circuit breaker 100 by being fixed on a magnet support provided separately in the circuit breaker 100. can The fixing magnet 280 may be formed/manufactured/designed in a 'C' shape including two opposing pillars (eg, first and second pillars), see FIGS. 4 and 5 for this. Therefore, it will be described in detail below.

The movable magnet 250 is fixed to a position adjacent to the fixed magnet 280 (in particular, the upper side of the fixed magnet 280) in a non-contact state with the fixed magnet 280, and according to the magnetic attraction of the fixed magnet 280 It may be in contact or non-contact with the fixed magnet 280 . In particular, the movable magnet 250 is fixed on the magnet support by using an elastic material/part (eg, a yoke, etc.) for fixing the movable magnet 250 at a predetermined position, and a fixed distance from the fixed magnet 280 . can keep

As the magnetic flux density increases in the fixed magnet 280 due to the occurrence of an accident current, the movable magnet 250 is in contact with the fixed magnet 280, and as the magnetic flux density decreases, the movable magnet 250 is elastic based on the You can return to the original position. When the movable magnet 250 and the fixed magnet 280 are not in contact, the power of the breaker is maintained in an ON state, but when the movable magnet 250 and the fixed magnet 280 are in contact, the power of the circuit breaker 100 is It trips and goes to the off state (ie, performs a trip operation). A more specific instantaneous/earth leakage trip operation will be described later in detail with reference to FIGS. 12 to 16 .

The first electric wire 320 may be provided to penetrate the inside of the fixed magnet 280 to form a circuit in a predetermined direction. In particular, the first wire part 320 may be provided to pass between the first and second pillars formed on the fixed magnet 280 , and through the first wire part 320 in the fixed magnet 280 . The direction of the flowing current may be opposite to each other for each of the first and second instantaneous trip devices 110 - 1 and 110 - 2 . For example, the current flowing through the fixed magnet 280 of the first instantaneous trip device 110-1 is formed in the first direction, and the fixed magnet 280 of the second instantaneous trip device 110-2 The current flowing through it may be formed in a second direction opposite to the first direction.

Using the above-described components/parts, the first and second instantaneous trip devices 110-1 and 110-2 perform an instantaneous trip operation for the fault current. Furthermore, the second instantaneous trip device 110 - 2 may include the earth leakage trip coil unit 810 in addition to the above-described common components/parts to perform the earth leakage trip operation double in addition to the instantaneous trip operation.

The earth leakage trip coil unit 810 includes a fixing bobbin 270 fixed to the fixing magnet 280 and a short circuit trip coil 260 wound a plurality of times (eg, hundreds to thousands of times) on the fixing bobbin 270 . ) may be included. The earth leakage trip coil unit 810 is fixed to the second instantaneous trip device 110 - 2 by inserting the first or second pillar portion of the fixing magnet 280 into the through hole formed in the center of the fixing bobbin 270 . It may be combined with the magnet 280 . When a leakage current occurs, the sensor that detects the leakage current in the breaker 100 is a zero-phase current transformer (ZCT), and the current/voltage signal induced in the zero-phase current transformer (ZCT) can be used as an input of the leakage detection electronic circuit in the circuit breaker 100. have. When it is determined that it is a short circuit, the electronic switch of the output part, which is a part of the electric leakage detection electronic circuit, may be in an ON state, and the magnetic flux density of the fixed magnet 280 may be increased by being magnetized as a current flows in the earth leakage trip coil connected thereto. . As a result, as a magnetic attraction force is generated in the fixed magnet 280 , an earth leakage trip operation may be performed by making contact with the movable magnet 250 . A more specific earth leakage trip operation will be described below in detail with reference to FIGS. 14 to 16 .

Due to the earth leakage trip coil unit 810, the second instantaneous trip device 110-2 functions as an instantaneous trip device when a fault current occurs and as an earth leakage trip device when an earth leakage current occurs, thereby performing a double trip operation. It has the effect that it can. Therefore, as the instantaneous trip device and the earth leakage trip device are configured as separate parts, the problems of the prior art, such as an increase in component complexity/size, an increase in assembly difficulty, and an increase in manufacturing cost, are all solved according to the present invention. Occurs.

In this figure, the circuit breaker 100 is illustrated and described as an example of a 2-pole circuit breaker, but is not limited thereto, and the present invention can be applied to 3-pole, 4-pole, ... N-pole circuit breaker in the same/similar manner. . When the present invention is applied to an N-pole circuit breaker, N instantaneous trip devices may be included, and instantaneous and earth leakage trips by coupling/installing the earth leakage trip coil unit 810 to the fixed magnet 280 of any one of these instantaneous trip units. A second instantaneous trip device 110 - 2 capable of simultaneous execution may be implemented.

4 is a diagram illustrating components of a first instantaneous trip device according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating components of a second instantaneous trip device according to an embodiment of the present invention.

1 to 5 , the first and second instantaneous trip devices 110 - 1 and 110 - 2 may include a fixed magnet 280 and a movable magnet 250 for instantaneous trip operation.

The fixed magnet 280, as illustrated in this figure, may be manufactured in a 'C' or 'U' shape, and the first and second pillars 280-1 and 280- facing/opposing each other 2) may be included.

The movable magnet 250 may include a movable armature 250-1 and a yoke 250-2 (eg, a yoke combined with a return spring), as illustrated in this figure.

The movable armature 250-1 is forcibly rotated toward the fixed magnet 280 as the magnetic attraction force on the fixed magnet 280 increases (or as the preset attractive force is exceeded) and is in contact with the fixed magnet 280. Components/parts may correspond to The movable armature 250-1 may have a first bent shape, such as a 'L' shape, and is divided into a first part 250-1a and a second part 250-1b based on the bent part. can be The first portion 250 - 1a is a portion that is in contact with or not in contact with the fixing magnet 280 , and may be connected to the yoke 250 - 2 . The second portion 250-1b is installed at a position opposite to the trip latch 240 and performs a function of pushing the trip latch 240 in a specific direction by rotation of the movable armature 250-1, as a result. A trip operation in which the power of the circuit breaker 100 is turned off may be performed by releasing the restraint between the trip latch 240 and the lever 230 .

One end of the yoke 250 - 2 is fixed to the movable armature 250 - 1 (in particular, the first portion 250 - 1a ), and may function to support the movable armature 250 - 1 . In particular, the yoke 250-2 is made of an elastic material/material, and as the magnetic attraction decreases (or decreases below a predetermined attraction force), the movable armature 250-1 is fixed with the magnet 280 and It is possible to provide an elastic force to return to the separated original position.

The movable magnet 250 is installed in a state where the first portion 250-1a of the movable armature 250-1 is spaced apart by a predetermined distance on the upper side of the fixed magnet 280, as illustrated in these drawings. / It can be fixed, and a magnet support (not shown) for maintaining this installation / fixed state can be introduced into the circuit breaker. The yoke 250-2 and the fixed magnet 280 of the movable magnet 250 may be installed/fixed in the circuit breaker by being inserted and fixed in the magnet support. For the specific installation/fixing method through the magnet support, FIGS. It will be described in detail below with reference to the following.

Referring to FIG. 5 , the second instantaneous trip device 110 - 2 may further include an earth leakage trip coil unit 810 in addition to the fixed magnet 280 and the movable magnet 250 .

The earth leakage trip coil unit 810 includes a fixing bobbin 270 fixed to the fixing magnet 280 , and a short circuit trip coil 260 wound a plurality of times (eg, hundreds to thousands of times) on the fixing bobbin 270 . ) may be included. The earth leakage trip coil unit 810 is a fixed magnet by inserting the first or second pillars 280-1 and 280-2 of the fixing magnet 280 into the through hole formed in the center of the fixing bobbin 270. (280). The earth leakage trip coil unit 810 may also be fixed by being mounted on a magnet support (not shown), and a specific fixing method will be described below.

When the parts illustrated in FIG. 4 are fixed/mounted/installed on the magnet support (not shown), the first instantaneous trip device/assembly 110-1, and the parts illustrated in FIG. 5 are fixed/mounted/installed on the magnet support (not shown) When mounted/installed, it is divided/functions as the second instantaneous trip device/assembly 110-2.

6 to 8 are views illustrating a fixing/installing method of a fixing magnet and an earth leakage trip coil unit to a magnet support according to an embodiment of the present invention.

6 to 8, the magnet support 610 for stably supporting and fixing the fixed magnet 280, the movable magnet 250, and the earth leakage trip coil unit 810 in the circuit breaker 100 (or support/storage/fixing case) may be introduced. In the magnet support 610, a region for inserting/mounting/receiving each part of the fixed magnet 280 and the movable magnet 250 may be formed, and for physically fixing/seating the part inserted in each region Various fixing means may be formed. For example, the magnet support 610 may have fixing hooks 710 and 720 (or fixing parts) protruding inwardly at positions corresponding to the boundary regions of each part. Therefore, the part inserted into the magnet support 610 may be stably fixed to the magnet support 610 by being seated on the fixing hooks 710 and 720 in the boundary region.

More specifically, referring to FIGS. 6 and 7 ( a ), the magnet support 610 has a fixing hook 710 protruding inward as a means for fixing the fixing magnet 280 to the magnet support 610 . may be formed. In addition, the fixing magnet 280 has first and second grooves recessed inward at positions corresponding to the fixing hooks 710 among both sides of the first and second pillar parts 280-1 and 280-2, respectively. may be formed. Accordingly, the fixing magnet 280 is inserted into the fixing magnet fixing/receiving area formed in the magnet support 610, and then the fixing hook 710 formed in the fixing magnet fixing/receiving area is the first and the first 2 It can be fixed on the magnet support 610 by being seated in the groove.

6, 7(b) and 8, the magnet support 610 has a bobbin protruding inward as a means for fixing the earth leakage trip coil unit 810 coupled/mounted/fastened to the fixing magnet 280. For hook 720 may be formed. Therefore, after the earth leakage trip coil unit 810 is coupled/mounted/fastened to the fixing magnet 280, the fixing bobbin 270 (in particular, the boundary area of the fixing bobbin 270) is connected to the bobbin fixing hook ( 720) (in particular, the lower side of the hook for fixing the bobbin) may be fixed on the magnet support 610 .

The magnet support 610 may include a plurality of posts formed in the boundary region of each part in order to stably support and fix the parts fixed therein, and by inserting a predetermined part between the plurality of posts, the magnet support It may be fixed/mounted/coupled/fastened on 610 . The above-described fixing hooks 710 and 720 may be formed at the top of these pillars, and the parts inserted between the pillars are not separated to the outside by the hooks 710 and 720 protruding inward at the top end. Thus, it is stably fixed / seated on the magnet support 610 .

9 is a view illustrating a fixing/installing method of a movable magnet to a magnet support according to an embodiment of the present invention.

Referring to FIG. 9 , in the magnet support 610 , a movable magnet fixing/receiving area for fixing/accommodating the movable magnet 250 may be formed on the rear side of the fixed magnet fixing/receiving area. More specifically, in the movable magnet fixing/receiving area, first and second pillars 610-1 and 610-2 that are spaced apart from each other by a predetermined distance to face each other may be formed, and any one pillar 610 A hook protruding inward may be formed at the uppermost end of the -1 and 610-2 (eg, the second pillar 610-2 located outside). On the support of the yoke 250 - 2 , a through hole may be formed at a position corresponding to the height of the hook. Therefore, the movable magnet 250 is, after the yoke 250-2 is inserted between the first and second posts 610-1 and 610-2, the hook is seated/fastened in the through hole of the yoke, whereby the movable magnet is 250 may be fixed on the magnet support 610 .

10 and 11 are assembly views of first and second instantaneous trip devices according to an embodiment of the present invention.

10 and 11, after the fixed magnet, the movable magnet, and the earth leakage trip coil part are fixed/installed/fastened to the magnet support 610, the first wire part 320 connected to the electrode is connected to the fixed magnet 280. By passing through the first and second instantaneous trip devices (110-1, 110-2) can be configured.

12 to 14 are diagrams illustrating instantaneous trip operations of first and second instantaneous trip devices according to an embodiment of the present invention.

First, referring to FIG. 12 , the current flowing in through the power supply side (eg, Line pole) terminal 1110 is energized in the direction of the arrow shown in this figure along the circuit formed by the second wire unit 1160 . Also, the first and second instantaneous trip devices 110 - 1 and 110 - 2 may be located on the converter.

The current flowing in through the power-side terminal 1110 may pass through the fixed magnet 280 of the first instantaneous trip device 110-1 through the first wire unit 320 to be energized to the load-side terminal 1170 . In addition, the current passing through the load-side terminal 1170 passes through the fixed magnet 280 of the second instantaneous trip device 110-2 and passes through the first wire unit 320 to the opposite power supply side (eg, neutral pole) The terminal can be energized. Accordingly, the directions of currents passing through the fixed magnets 280 of the first and second instantaneous trip devices 110 - 1 and 110 - 2 may be opposite to each other.

As the current flows inside the fixed magnet 280 , the magnetic attraction force (or magnetic flux density) of the fixed magnet 280 may increase in proportion to the amount of the current. When the magnetic attraction force is not large enough to attract the movable magnet 250 (that is, if it is less than the preset attraction force), the movable magnet 250 does not move toward the fixed magnet 280 and thus non-contact with the fixed magnet 280 . The state can be maintained, and when the magnetic attraction force is formed large enough to attract the movable magnet 250 (that is, when it exceeds the preset attraction force), the movable magnet 250 moves toward the fixed magnet 280 to be in contact with the fixed magnet 280 . As a result, when a non-accident/normal current of less than a preset size is energized to the fixed magnet 280, the non-contact state between the movable magnet 250 and the fixed magnet 280 is maintained, and the accident current exceeding the preset size When the fixed magnet 280 is energized, the movable magnet 250 and the fixed magnet 280 may be changed to a contact state by the magnetic attraction force of the fixed magnet 280 .

13 and 14 (a), in a non-contact state between the movable and fixed magnets 250 and 280, the second portion 250-1b of the movable armature 250-1 faces the trip latch 240/ It may be provided in a contact state. The trip latch 240 is constrained with the lever 230 (1310), and based on the binding force of the lever and 230, a holding force for maintaining the ON state of the breaker 100 is applied to the power handle 210 of the breaker 100. functions provided in Accordingly, the preset suction force for moving/moving the movable magnet 250 to the fixed magnet 280 side is the force to overcome/release the binding force 1310 between the trip latch 240 and the lever 230 and the yoke 250- It can be determined based on the elastic force of 2). Therefore, the magnetic attraction force exceeding the magnitude of overcoming/releasing the restraint force 1310 between the trip latch 240 and the lever 230 and overcoming the elastic force of the yoke 230-2 is generated in the fixed magnet 280 at the same time. Only in this case, the movable magnet 250 may be movable/moved to the fixed magnet 280 .

Referring to FIGS. 13 and 14 (b), when the magnetic attraction exceeding the preset attraction force is generated in the fixed magnet 280, the first portion 250-1a of the movable armature 250-1 is formed by the fixed magnet ( 280) direction, so that the movable armature 250-1 and the fixed magnet 280 can be in contact with each other (refer to the direction of the arrow in FIGS. 13 and 14 (b)). In this case, the second part 250-1b of the movable armature 250-1, which was in contact with the trip latch 240 in the non-contact state, moves in a predetermined direction according to the movement of the first part 250-1a. While the trip latch 240 can be pushed to one side (refer to the direction of the arrow in FIGS. 13 and 14 (b)). Since the trip latch 240 is constrained 1310 with the lever 230 to form a supporting point for maintaining the handle 210 of the circuit breaker 100 in an on state (a state in which a fixed contact and a movable contact are in contact), the trip As the latch 240 is pushed, the restraint with the lever 230 is released/collapsed 1320 to deviate from the supporting point, and as a result, the handle 210 on state holding force is lost, and the handle 210 is in the off state (fixed contactor). 310 and the movable contactor 300 may be switched to a non-contact state, that is, a trip state) (ie, an instantaneous trip operation).

In general, magnetic force (ie, magnetic attraction force) is proportional to the magnitude of the current, and the magnitude of the current is proportional to the number of turns of the conductor. Therefore, by increasing or decreasing the number of windings of the first wire part 320 penetrating the fixed magnet 280 , the magnitude of the magnetic attraction force flowing through the fixed magnet 280 can be increased or decreased, and through this, the breaker 100 is manufactured according to the rating can facilitate To this end, the first and second wire parts 320 and 1160 are externally covered with an insulating material to maintain an insulating state from other parts (eg, a fixed magnet, a movable magnet, an earth leakage trip coil part, etc.) can be provided to do so. As a result, since the insulating state of the first and second wire parts 320 and 1160 is maintained, the number of windings of the first wire part 320 can be increased or decreased to facilitate rated classification manufacturing.

The first wire part 320 will be described later in detail with reference to Figs.

15 and 16 are diagrams illustrating an earth leakage trip operation of a second instantaneous trip device according to an embodiment of the present invention.

Unlike the instantaneous trip operation, the earth leakage trip operation is not performed based on the magnitude of the current passing through the fixed magnet 280 , but the principle of magnetizing the fixed magnet 280 using a separate component called the earth leakage trip coil unit 810 . can be operated with In particular, the key to the earth leakage trip operation of the present invention is to magnetize the fixed magnet 280 by allowing a current to flow in the earth leakage trip coil 260 through an electronic circuit using the output voltage of the ZCT. The ZCT does not generate a voltage/current signal when the vector sum of currents input and output through the inner hole is 0, but in other cases (that is, when a leakage current occurs), the voltage is proportional to the current difference. / Current signal is output.

A more specific earth leakage trip operation may be performed in the following order.

15 and 16, first of all, the zero phase current transformer (ZCT) is a vector sum of currents flowing through the second wire unit 1160 connected to the power supply terminal (eg, the line pole passing through the zero phase current transformer (ZCT)) It may be determined whether the sum of the vector currents between the two wires 1160 and the second wire portion 1160 of the neutral pole) is zero. If the vector sum of the currents is not 0, the zero-phase current transformer (ZCT) determines that an earth leakage current has occurred and provides a current/voltage signal so that a voltage is applied to the earth leakage trip coil 260 through the earth leakage detection circuit for the earth leakage breaker. Thus, a current may flow in the earth leakage trip coil 260 . As current flows in the earth leakage trip coil 260, the fixed magnet 280 of the second instantaneous trip device 110-2 may be magnetized. 250 may be moved toward the fixed magnet 280 to be in contact with each other.

The fact that the restraint between the trip latch 240 and the lever 230 is released according to the movement/activation of the movable magnet 250 so that the circuit breaker 100 can be switched to the off state is as described above with reference to FIGS. 12 and 13 . , and overlapping descriptions are omitted.

As such, the earth leakage trip device (ie, the second instantaneous trip device 110-2) according to an embodiment of the present invention connects the earth leakage trip coil unit 810 to the fixed magnet 280 of the first instantaneous trip device 110-1. ), since it can be implemented only by inserting into the ), the total number of assembly parts and assembly complexity are reduced, thereby saving manufacturing cost and time. In particular, the second instantaneous trip device 110-2 can be easily implemented by inserting/combining the earth leakage trip coil unit 810 into the first instantaneous trip device 110-1, and the second instantaneous trip device 110-2 ), the first instantaneous trip device 110-1 can be easily implemented by releasing/separating the earth leakage trip coil unit 810. The earth leakage trip coil unit 810 may be coupled to at least one of the N fixed magnets 280 provided in the N-pole circuit breaker, and instantaneous including the earth leakage trip coil unit 810 and the fixed magnet 280 coupled to it. The trip device 110 - 2 is capable of double performing an earth leakage trip operation simultaneously with an instantaneous trip operation.

17 to 19 are conceptual views illustrating an embodiment of the winding increase/decrease of the first electric wire part according to an embodiment of the present invention.

In particular, FIGS. 17 and 19 are plan views of the first and second instantaneous trip devices 110-1 and 110-2, and FIG. 18 is a front view of the first and second instantaneous trip devices 110-1 and 110-2. It corresponds to conceptual diagrams expressed conceptually.

17 and 18, the first wire portion 320 is largely connected from the line pole and the line pole connecting wire 1610 passing through the fixed magnet 280 of the first instantaneous trip device 110-1, and, The second instantaneous trip device 110-2 may be divided into a neutral connection wire 1620 that passes through the fixed magnet 280 and is connected to a neutral pole. The direction of the current flowing through the line pole connecting wire 1610 and the neutral connecting wire 1620 may be opposite to each other when viewed in a plan view, and the Line pole connecting wire passing through each fixed magnet 280 ( 1610) and a neutral connecting wire 1620, a one-winding effect may occur.

As described above, in general, the magnetic force is proportional to the magnitude of the current, and the magnitude of the current is proportional to the number of turns of the conductor. Therefore, by increasing or decreasing the number of windings of the first wire part 320 penetrating the fixed magnet 280 , the magnitude of the magnetic attraction force flowing through the fixed magnet 280 can be increased or decreased, and through this, the breaker 100 is manufactured according to the rating can facilitate The increase/decrease in the number of windings of the first wire unit 320 is, as illustrated in FIG. 19 , the first wire centered on any one of the pillars 280-1 and 280-2 formed on the fixed magnet 280. This may be performed by winding the part 320 several times. More specifically, with respect to the first instantaneous trip device 110-1, the first wire unit 320 is wound N times on any one of the first and second pillars 280-1 and 280-2. The number of windings can be increased or decreased, and for the second instantaneous trip device 110-2, the first wire part 320 is installed on the posts 280-1 and 280-2 to which the earth leakage trip coil part 810 is not coupled. By winding N turns, the number of windings can be increased or decreased.

The circuit breaker manufacturer can overcome the binding force between the trip latch 240 and the lever 230 and the elastic force of the yoke 250-2 as the accident/leakage current to be cut off flows along the first wire part 320. In order to generate a magnetic attraction force with a size (a size exceeding a preset attractive force), the number of windings may be appropriately adjusted/decreased. Based on this degree of freedom for adjusting the number of turns, the circuit breaker manufacturer can design the instantaneous trip devices 110-1 and 110-2 to be small, so that the overall size of the circuit breaker 100 can be reduced. In addition, in the case of the conventional product, the fixed magnet 280 and the first wire part 320 are integrated, so that the number of windings is limited to one in many cases, but in the case of the present invention, the fixed magnet 280 and the first wire part 320 ), the number of windings can be easily adjusted because the insulation state is maintained between the

20 and 21 illustrate the completeness of the assembly of the circuit breaker according to an embodiment of the present invention. In particular, FIG. 20 is an assembled side view of a circuit breaker according to an embodiment of the present invention, and FIG. 21 illustrates an assembled front view of the circuit breaker according to an embodiment of the present invention, respectively.

Although each drawing is described separately for convenience of description, it is also possible to design to implement a new embodiment by merging the embodiments described in each drawing. In addition, the present invention is not limited to the configuration and method of the described embodiments as described above, but the above-described embodiments are configured by selectively combining all or part of each embodiment so that various modifications can be made. it might be

In addition, although preferred embodiments have been illustrated and described above, the present specification is not limited to the specific embodiments described above, and those of ordinary skill in the art to which the specification pertains without departing from the gist of the claims Various modifications are possible by a person, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present specification.

Claims (16)

A circuit breaker comprising an earth leakage instantaneous double trip device, the circuit breaker comprising:
first and second instantaneous trip devices performing an instantaneous trip operation when a fault current occurs; and
a trip latch and a lever for providing a holding force for maintaining an on state of the breaker based on a mutual restraining force to a power handle of the breaker; including,
each of the first and second instantaneous trip devices,
a fixed magnet that generates a magnetic attraction force when the fault current flows;
a movable magnet provided in a position adjacent to the fixed magnet in a non-contacting state with the fixed magnet, which is in contact or non-contact with the fixed magnet according to a magnetic attraction force of the fixed magnet; and
a first wire portion provided to penetrate the inside of the fixed magnet to form a circuit in a predetermined direction; include in common,
The second instantaneous trip device further includes an earth leakage trip coil unit fixed to the fixed magnet to perform an earth leakage trip operation for the earth leakage current in addition to the instantaneous trip operation;
The movable magnet is
a movable armature which is forcibly rotated toward the fixed magnet as the magnetic attractive force exceeds a preset attractive force and is in contact with the fixed magnet; and
a yoke having one end fixed to the movable armature and providing an elastic force for returning the movable armature in contact with the fixed magnet to its original position as the magnetic attraction force decreases below the preset attractive force; including,
The movable armature,
It has a primary bent 'a' shape, with a focus on the bent area:
a first portion in contact or non-contact with the fixing magnet and connected to the yoke; and
a second portion installed to face the trip latch in the circuit breaker; is separated by
When the magnetic attraction force exceeding the preset attraction force is generated in the fixed magnet of at least one of the first and second instantaneous trip devices according to the occurrence of the fault current:
As the first part of the movable armature comes into contact with the fixed magnet by the magnetic attraction force, the second part pushes the trip latch in a predetermined direction;
As the trip latch is pushed out, the restraint between the trip latch and the lever is released;
The instantaneous trip operation is performed as the holding force is lost as the restraint is released and the circuit breaker is switched to an off state. delete delete delete delete The method of claim 1,
The predetermined suction force is,
the circuit breaker being determined based on the magnitude of the force overcoming the restraining force between the trip latch and the lever. The method of claim 1,
The earth leakage trip coil unit,
a bobbin for fixing, which is fixed to the fixing magnet; and
an earth leakage trip coil wound on the fixing bobbin; Including, circuit breaker. 8. The method of claim 7,
The fixing magnet includes first and second pillar portions facing each other,
and the earth leakage trip coil unit is fixed to the fixing magnet by inserting the first or second pillar part of the second instantaneous trip device into a through hole formed in the center of the fixing bobbin. 9. The method of claim 8,
a zero phase current transformer for sensing the leakage current; Further comprising, a circuit breaker. 10. The method of claim 9,
If the leakage current occurs,
The zero phase current transformer detects the leakage current and outputs the current to the earth leakage trip coil unit,
The magnetic attraction force is generated in the fixed magnet as the current flows in the earth leakage trip coil unit. 11. The method of claim 10,
When a magnetic attraction exceeding the preset attraction force is generated in the fixed magnet of the second instantaneous trip device according to the occurrence of the leakage current,
As the first part of the movable armature comes into contact with the fixed magnet by the magnetic attraction force, the second part pushes the trip latch in a predetermined direction;
As the trip latch is pushed out, the restraint between the trip latch and the lever is released;
As the restraint is released, the holding force is lost and the circuit breaker is switched to an off state, whereby the earth leakage trip operation is performed. The method of claim 1,
a magnet support for fixing and supporting the fixed magnet and the movable magnet; further comprising,
In the magnet support, a hook protruding inward to fix the fixed magnet and the movable magnet inserted therein is formed, the circuit breaker. 13. The method of claim 12,
The fixing magnet includes first and second pillar portions facing each other,
First and second grooves recessed inwardly are formed on both sides of each of the first and second pillars,
The fixed magnet is fixed on the magnet support by being inserted into the fixed magnet fixing area formed in the magnet support, and then the hooks formed in the fixed magnet fixing area are seated in the first and second grooves, breaker. 14. The method of claim 13,
A through hole is formed in the support of the yoke,
The movable magnet is, after being inserted into the movable magnet fixing area, a hook formed in the movable magnet fixing area is seated in the through hole, whereby the movable magnet is fixed on the magnet support, a circuit breaker. The method of claim 1,
The first wire part is wound at least once around any one of the pillars formed on the fixed magnet,
When the fault current and the leakage current occur, the magnetic attraction force generated in the fixed magnet increases in proportion to the number of windings in the first wire part, the circuit breaker. The method of claim 1,
A circuit breaker that is electrically insulated from the fixed magnet and the movable magnet by covering an outside of the first wire part with an insulating material.

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